msm: ipa: Correct TRACE_INCLUDE_PATH

The macro definition of 'TRACE_INCLUDE_PATH' would
result in a warning. This patch fixes the warnings
when used in a GCC environment.

Change-Id: Ie3ed621f16964237ddf1d001cb5816222590a663
Signed-off-by: Anant Goel <anantg@codeaurora.org>